Bulbophyllum pachyrachis

(A. Richard) Grisebach

Fl. Brit. W. I., 613. 1864.

Common names: Rat-tail orchid
Illustrated
Basionym: Pleurothallis pachyrachis A. Richard in R. de la Sagra, Hist. Fis. Cuba 11: 234. 1850 (as pachyrhachis)
Treatment appears in FNA Volume 26. Treatment on page 619.

Plants creeping. Roots numerous, yellowish, often branched, 0.5–1 mm diam. Stems stout; rhizomes 8–55 × 2.5–7 mm; pseudobulbs 3–4-angled, 1–5 × 0.7–2.5 cm. Leaves 1–3; blade oblong to oblong-oblanceolate, 6–20 × 7–28 mm, leathery, apex acute to obtuse. Inflorescences: peduncle partially concealed by ensheathing, scarious bracts, 4–24 cm × 1.5–2.5 mm; spikes 12–28-flowered, 4–25 cm × 2–7 mm; floral bracts triangular-ovate, 2–5.5 mm. Flowers yellow-green, spotted red, sessile, glabrous; sepals 3-veined, concave, triangular-ovate or ovatelanceolate, 4–7 × 1.5–3 mm, fleshy, apex acuminate-caudate; petals oblongelliptic, 1–2.5 × 0.5–1.5 mm, apex obtuse to rounded; lip adnate to and articulate with column-foot, linguiform, 2.5–3 mm, very thick, fleshy, margins entire, verrucose; column stout, 2–2.5 mm, apex 3-dentate, middle tooth acute, 0.5 mm, lateral teeth winglike, oblong, subulate, 1 mm; column-foot slender, 1–1.5 mm; pollinia 2; ovary sessile, partially embedded in pits on rachis. Capsules cylindric, ribbed, 8–11 mm, glabrous.


Phenology: Flowering Nov–Dec.
Habitat: On hardwoods in swamps
Elevation: 5–20 m

Distribution

V26 1265-distribution-map.jpg

Fla., Mexico, West Indies, Central America, n South America

Discussion

The Florida population of Bulbophyllum pachyrachis reported by C. A. Luer (1972) no longer exists (E. Christenson, pers. comm.).

Selected References

None.

Lower Taxa

None.

"thin" is not a number."thick" is not a number.

... more about "Bulbophyllum pachyrachis"
self-pollination +
Obtuse (?) +  and Rounded (?) +
James D. Ackerman +
(A. Richard) Grisebach +
Pleurothallis pachyrachis +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
oblong +  and oblong-oblanceolate +
7mm;28mm +
4 cm40 mm <br />0.04 m <br /> (24 cm240 mm <br />0.24 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (?) +  and 0.25 cm2.5 mm <br />0.0025 m <br /> (?) +
cylindric +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 1.1 cm11 mm <br />0.011 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2mm +  and 2.5mm +
Rat-tail orchid +
Fla. +, Mexico +, West Indies +, Central America +  and n South America +
free +  and distinct +
5–20 m +
0.2 cm2 mm <br />0.002 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
spotted red +  and yellow-green +
On hardwoods in swamps +
subulate +  and oblong +
1 cm10 mm <br />0.01 m <br /> (?) +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
1 (?) +  and 3 (?) +
reduced +
leathery +
linguiform +
larger +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
verrucose +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
free +  and distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
smaller +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Flowering Nov–Dec. +
ceraceous +  and hard +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Fl. Brit. W. I., +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
aerial +  and subterranean +
minute +
free +, distinct +, adnate +  and connate +
ovatelanceolate +, triangular-ovate +  and concave +
not +  and alike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Illustrated +
12-28-flowered +
4 cm40 mm <br />0.04 m <br /> (25 cm250 mm <br />0.25 m <br />) +
erect +  and pendent +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
rhizomatous +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Bulbophyllum pachyrachis +
Bulbophyllum +
species +
annual +  and perennial +
lithophytic +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +